| 摘要 |
PURPOSE:To improve radio call service by alarming that a frame synchronizing signal and a group number transmitted from a radio base station are not received when such situation happens. CONSTITUTION:When the reception of signals is awaited, whether or not a frame synchronizing signal FS and a group number GID are detected is discriminated by the signal from a decoder 32, when they are not detected, a frequency synthesizer 10 is controlled, and the signal at the frequencies of a next channel is obtained. In the same way, a processing is executed for the channels in an (n) number set at a ROM 4 beforehand, and the fact that the all allocated channels are unreceivable is displayed on a channel display device 8 by controlling an LCD driver 33. In such a way, since the unreceivable fact of the all channels is displayed on the channel display 8, the signals can arrive by moving to the receivable area, and the radio call service can be improved. |
